.notfound{
    position: relative;
    height: 100%;
    width: 100%;
    background-image: linear-gradient( #747477,#9198e5);
    .notfound_img{
        position: absolute;
        width: 300px;
        height: 300px;
        left: 0;
        right: 0;
        top: 0;
        bottom: 0;
        margin: auto;
        img{
            height: 100%;
            width: 100%;
        }
    }
    .box_span{
        display: block;
        position: absolute;
        height: 3px;
        width: 3px;
        border-radius: 50%;
        animation: big 3s infinite;
        box-shadow: 0px 0px 5px #fff;
        
    }
    @keyframes big{
        0%{
            opacity: 0;
        }
        100%{
            opacity: 1;
        }
    }
}